Taeung Song [Wed, 4 Jul 2018 13:36:36 +0000 (22:36 +0900)]
samples/bpf: add missing <linux/if_vlan.h>
This fixes build error regarding redefinition:
CLANG-bpf samples/bpf/parse_varlen.o
samples/bpf/parse_varlen.c:111:8: error: redefinition of 'vlan_hdr'
struct vlan_hdr {
^
./include/linux/if_vlan.h:38:8: note: previous definition is here
So remove duplicate 'struct vlan_hdr' in sample code and include if_vlan.h
Signed-off-by: Taeung Song <treeze.taeung@gmail.com> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Magnus Karlsson [Fri, 29 Jun 2018 07:48:20 +0000 (09:48 +0200)]
xsk: fix potential race in SKB TX completion code
There is a potential race in the TX completion code for the SKB
case. One process enters the sendmsg code of an AF_XDP socket in order
to send a frame. The execution eventually trickles down to the driver
that is told to send the packet. However, it decides to drop the
packet due to some error condition (e.g., rings full) and frees the
SKB. This will trigger the SKB destructor and a completion will be
sent to the AF_XDP user space through its
single-producer/single-consumer queues.
At the same time a TX interrupt has fired on another core and it
dispatches the TX completion code in the driver. It does its HW
specific things and ends up freeing the SKB associated with the
transmitted packet. This will trigger the SKB destructor and a
completion will be sent to the AF_XDP user space through its
single-producer/single-consumer queues. With a pseudo call stack, it
would look like this:
Core 1:
sendmsg() being called in the application
netdev_start_xmit()
Driver entered through ndo_start_xmit
Driver decides to free the SKB for some reason (e.g., rings full)
Destructor of SKB called
xskq_produce_addr() is called to signal completion to user space
Core 2:
TX completion irq
NAPI loop
Driver irq handler for TX completions
Frees the SKB
Destructor of SKB called
xskq_produce_addr() is called to signal completion to user space
We now have a violation of the single-producer/single-consumer
principle for our queues as there are two threads trying to produce at
the same time on the same queue.
Fixed by introducing a spin_lock in the destructor. In regards to the
performance, I get around 1.74 Mpps for txonly before and after the
introduction of the spinlock. There is of course some impact due to
the spin lock but it is in the less significant digits that are too
noisy for me to measure. But let us say that the version without the
spin lock got 1.745 Mpps in the best case and the version with 1.735
Mpps in the worst case, then that would mean a maximum drop in
performance of 0.5%.
Fixes: 35fcde7f8deb ("xsk: support for Tx") Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Magnus Karlsson [Fri, 29 Jun 2018 07:48:19 +0000 (09:48 +0200)]
samples/bpf: deal with EBUSY return code from sendmsg in xdpsock sample
Sendmsg in the SKB path of AF_XDP can now return EBUSY when a packet
was discarded and completed by the driver. Just ignore this message
in the sample application.
Fixes: b4b8faa1ded7 ("samples/bpf: sample application and documentation for AF_XDP sockets") Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com> Reported-by: Pavel Odintsov <pavel@fastnetmon.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Magnus Karlsson [Fri, 29 Jun 2018 07:48:18 +0000 (09:48 +0200)]
xsk: frame could be completed more than once in SKB path
Fixed a bug in which a frame could be completed more than once
when an error was returned from dev_direct_xmit(). The code
erroneously retried sending the message leading to multiple
calls to the SKB destructor and therefore multiple completions
of the same buffer to user space.
The error code in this case has been changed from EAGAIN to EBUSY
in order to tell user space that the sending of the packet failed
and the buffer has been return to user space through the completion
queue.
Fixes: 35fcde7f8deb ("xsk: support for Tx") Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com> Reported-by: Pavel Odintsov <pavel@fastnetmon.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Magnus Karlsson [Fri, 29 Jun 2018 07:48:17 +0000 (09:48 +0200)]
xsk: fix potential lost completion message in SKB path
The code in xskq_produce_addr erroneously checked if there
was up to LAZY_UPDATE_THRESHOLD amount of space in the completion
queue. It only needs to check if there is one slot left in the
queue. This bug could under some circumstances lead to a WARN_ON_ONCE
being triggered and the completion message to user space being lost.
Fixes: 35fcde7f8deb ("xsk: support for Tx") Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com> Reported-by: Pavel Odintsov <pavel@fastnetmon.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md
Pull MD fixes from Shaohua Li:
"Two small fixes for MD:
- an error handling fix from me
- a recover bug fix for raid10 from BingJing"
* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md:
md/raid10: fix that replacement cannot complete recovery after reassemble
MD: cleanup resources in failure
1) Verify netlink attributes properly in nf_queue, from Eric Dumazet.
2) Need to bump memory lock rlimit for test_sockmap bpf test, from
Yonghong Song.
3) Fix VLAN handling in lan78xx driver, from Dave Stevenson.
4) Fix uninitialized read in nf_log, from Jann Horn.
5) Fix raw command length parsing in mlx5, from Alex Vesker.
6) Cleanup loopback RDS connections upon netns deletion, from Sowmini
Varadhan.
7) Fix regressions in FIB rule matching during create, from Jason A.
Donenfeld and Roopa Prabhu.
8) Fix mpls ether type detection in nfp, from Pieter Jansen van Vuuren.
9) More bpfilter build fixes/adjustments from Masahiro Yamada.
10) Fix XDP_{TX,REDIRECT} flushing in various drivers, from Jesper
Dangaard Brouer.
11) fib_tests.sh file permissions were broken, from Shuah Khan.
12) Make sure BH/preemption is disabled in data path of mac80211, from
Denis Kenzior.
13) Don't ignore nla_parse_nested() return values in nl80211, from
Johannes berg.
14) Properly account sock objects ot kmemcg, from Shakeel Butt.
15) Adjustments to setting bpf program permissions to read-only, from
Daniel Borkmann.
16) TCP Fast Open key endianness was broken, it always took on the host
endiannness. Whoops. Explicitly make it little endian. From Yuching
Cheng.
17) Fix prefix route setting for link local addresses in ipv6, from
David Ahern.
18) Potential Spectre v1 in zatm driver, from Gustavo A. R. Silva.
19) Various bpf sockmap fixes, from John Fastabend.
20) Use after free for GRO with ESP, from Sabrina Dubroca.
21) Passing bogus flags to crypto_alloc_shash() in ipv6 SR code, from
Eric Biggers.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (87 commits)
qede: Adverstise software timestamp caps when PHC is not available.
qed: Fix use of incorrect size in memcpy call.
qed: Fix setting of incorrect eswitch mode.
qed: Limit msix vectors in kdump kernel to the minimum required count.
ipvlan: call dev_change_flags when ipvlan mode is reset
ipv6: sr: fix passing wrong flags to crypto_alloc_shash()
net: fix use-after-free in GRO with ESP
tcp: prevent bogus FRTO undos with non-SACK flows
bpf: sockhash, add release routine
bpf: sockhash fix omitted bucket lock in sock_close
bpf: sockmap, fix smap_list_map_remove when psock is in many maps
bpf: sockmap, fix crash when ipv6 sock is added
net: fib_rules: bring back rule_exists to match rule during add
hv_netvsc: split sub-channel setup into async and sync
net: use dev_change_tx_queue_len() for SIOCSIFTXQLEN
atm: zatm: Fix potential Spectre v1
s390/qeth: consistently re-enable device features
s390/qeth: don't clobber buffer on async TX completion
s390/qeth: avoid using is_multicast_ether_addr_64bits on (u8 *)[6]
s390/qeth: fix race when setting MAC address
...
qede: Adverstise software timestamp caps when PHC is not available.
When ptp clock is not available for a PF (e.g., higher PFs in NPAR mode),
get-tsinfo() callback should return the software timestamp capabilities
instead of returning the error.
Fixes: 4c55215c ("qede: Add driver support for PTP") Signed-off-by: Sudarsana Reddy Kalluru <Sudarsana.Kalluru@cavium.com> Signed-off-by: Michal Kalderon <Michal.Kalderon@cavium.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Use the correct size value while copying chassis/port id values.
Fixes: 6ad8c632e ("qed: Add support for query/config dcbx.") Signed-off-by: Sudarsana Reddy Kalluru <Sudarsana.Kalluru@cavium.com> Signed-off-by: Michal Kalderon <Michal.Kalderon@cavium.com> Signed-off-by: David S. Miller <davem@davemloft.net>
By default, driver sets the eswitch mode incorrectly as VEB (virtual
Ethernet bridging).
Need to set VEB eswitch mode only when sriov is enabled, and it should be
to set NONE by default. The patch incorporates this change.
Fixes: 0fefbfbaa ("qed*: Management firmware - notifications and defaults") Signed-off-by: Sudarsana Reddy Kalluru <Sudarsana.Kalluru@cavium.com> Signed-off-by: Michal Kalderon <Michal.Kalderon@cavium.com> Signed-off-by: David S. Miller <davem@davemloft.net>
qed: Limit msix vectors in kdump kernel to the minimum required count.
Memory size is limited in the kdump kernel environment. Allocation of more
msix-vectors (or queues) consumes few tens of MBs of memory, which might
lead to the kdump kernel failure.
This patch adds changes to limit the number of MSI-X vectors in kdump
kernel to minimum required value (i.e., 2 per engine).
Fixes: fe56b9e6a ("qed: Add module with basic common support") Signed-off-by: Sudarsana Reddy Kalluru <Sudarsana.Kalluru@cavium.com> Signed-off-by: Michal Kalderon <Michal.Kalderon@cavium.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Hangbin Liu [Sun, 1 Jul 2018 08:21:21 +0000 (16:21 +0800)]
ipvlan: call dev_change_flags when ipvlan mode is reset
After we change the ipvlan mode from l3 to l2, or vice versa, we only
reset IFF_NOARP flag, but don't flush the ARP table cache, which will
cause eth->h_dest to be equal to eth->h_source in ipvlan_xmit_mode_l2().
Then the message will not come out of host.
Here is the reproducer on local host:
ip link set eth1 up
ip addr add 192.168.1.1/24 dev eth1
ip link add link eth1 ipvlan1 type ipvlan mode l3
ip netns add net1
ip link set ipvlan1 netns net1
ip netns exec net1 ip link set ipvlan1 up
ip netns exec net1 ip addr add 192.168.2.1/24 dev ipvlan1
ip route add 192.168.2.0/24 via 192.168.1.2
ping 192.168.2.2 -c 2
ip netns exec net1 ip link set ipvlan1 type ipvlan mode l2
ping 192.168.2.2 -c 2
Add the same configuration on remote host. After we set the mode to l2,
we could find that the src/dst MAC addresses are the same on eth1:
Fix this by calling dev_change_flags(), which will call netdevice notifier
with flag change info.
v2:
a) As pointed out by Wang Cong, check return value for dev_change_flags() when
change dev flags.
b) As suggested by Stefano and Sabrina, move flags setting before l3mdev_ops.
So we don't need to redo ipvlan_{, un}register_nf_hook() again in err path.
Reported-by: Jianlin Shi <jishi@redhat.com> Reviewed-by: Stefano Brivio <sbrivio@redhat.com> Reviewed-by: Sabrina Dubroca <sd@queasysnail.net> Fixes: 2ad7bf3638411 ("ipvlan: Initial check-in of the IPVLAN driver.") Signed-off-by: Hangbin Liu <liuhangbin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Eric Biggers [Sat, 30 Jun 2018 22:26:56 +0000 (15:26 -0700)]
ipv6: sr: fix passing wrong flags to crypto_alloc_shash()
The 'mask' argument to crypto_alloc_shash() uses the CRYPTO_ALG_* flags,
not 'gfp_t'. So don't pass GFP_KERNEL to it.
Fixes: bf355b8d2c30 ("ipv6: sr: add core files for SR HMAC support") Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Sabrina Dubroca [Sat, 30 Jun 2018 15:38:55 +0000 (17:38 +0200)]
net: fix use-after-free in GRO with ESP
Since the addition of GRO for ESP, gro_receive can consume the skb and
return -EINPROGRESS. In that case, the lower layer GRO handler cannot
touch the skb anymore.
Commit 5f114163f2f5 ("net: Add a skb_gro_flush_final helper.") converted
some of the gro_receive handlers that can lead to ESP's gro_receive so
that they wouldn't access the skb when -EINPROGRESS is returned, but
missed other spots, mainly in tunneling protocols.
This patch finishes the conversion to using skb_gro_flush_final(), and
adds a new helper, skb_gro_flush_final_remcsum(), used in VXLAN and
GUE.
Fixes: 5f114163f2f5 ("net: Add a skb_gro_flush_final helper.") Signed-off-by: Sabrina Dubroca <sd@queasysnail.net> Reviewed-by: Stefano Brivio <sbrivio@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Merge tag 'for-4.18-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
Pull btrfs fixes from David Sterba:
"We have a few regression fixes for qgroup rescan status tracking and
the vm_fault_t conversion that mixed up the error values"
* tag 'for-4.18-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
Btrfs: fix mount failure when qgroup rescan is in progress
Btrfs: fix regression in btrfs_page_mkwrite() from vm_fault_t conversion
btrfs: quota: Set rescan progress to (u64)-1 if we hit last leaf
Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs fix from Al Viro:
"Followup to procfs-seq_file series this window"
This fixes a memory leak by making sure that proc seq files release any
private data on close. The 'proc_seq_open' has to be properly paired
with 'proc_seq_release' that releases the extra private data.
* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
proc: add proc_seq_release
Merge tag 'staging-4.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging
Pull staging/IIO fixes from Greg KH:
"Here are a few small staging and IIO driver fixes for 4.18-rc3.
Nothing major or big, all just fixes for reported problems since
4.18-rc1. All of these have been in linux-next this week with no
reported problems"
* tag 'staging-4.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
staging: android: ion: Return an ERR_PTR in ion_map_kernel
staging: comedi: quatech_daqp_cs: fix no-op loop daqp_ao_insn_write()
iio: imu: inv_mpu6050: Fix probe() failure on older ACPI based machines
iio: buffer: fix the function signature to match implementation
iio: mma8452: Fix ignoring MMA8452_INT_DRDY
iio: tsl2x7x/tsl2772: avoid potential division by zero
iio: pressure: bmp280: fix relative humidity unit
Merge tag 'tty-4.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull tty/serial fixes from Greg KH:
"Here are five fixes for the tty core and some serial drivers.
The tty core ones fix some security and other issues reported by the
syzbot that I have taken too long in responding to (sorry Tetsuo!).
The 8350 serial driver fix resolves an issue of devices that used to
work properly stopping working as they shouldn't have been added to a
blacklist.
All of these have been in linux-next for a few days with no reported
issues"
* tag 'tty-4.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
vt: prevent leaking uninitialized data to userspace via /dev/vcs*
serdev: fix memleak on module unload
serial: 8250_pci: Remove stalled entries in blacklist
n_tty: Access echo_* variables carefully.
n_tty: Fix stall at n_tty_receive_char_special().
Merge tag 'usb-4.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB fixes from Greg KH:
"Here is a number of USB gadget and other driver fixes for 4.18-rc3.
There's a bunch of them here, most of them being gadget driver and
xhci host controller fixes for reported issues (as normal), but there
are also some new device ids, and some fixes for the typec code.
There is an acpi core patch in here that was acked by the acpi
maintainer as it is needed for the typec fixes in order to properly
solve a problem in that driver.
All of these have been in linux-next this week with no reported
issues"
* tag 'usb-4.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (33 commits)
usb: chipidea: host: fix disconnection detect issue
usb: typec: tcpm: fix logbuffer index is wrong if _tcpm_log is re-entered
typec: tcpm: Fix a msecs vs jiffies bug
NFC: pn533: Fix wrong GFP flag usage
usb: cdc_acm: Add quirk for Uniden UBC125 scanner
staging/typec: fix tcpci_rt1711h build errors
usb: typec: ucsi: Fix for incorrect status data issue
usb: typec: ucsi: acpi: Workaround for cache mode issue
acpi: Add helper for deactivating memory region
usb: xhci: increase CRS timeout value
usb: xhci: tegra: fix runtime PM error handling
usb: xhci: remove the code build warning
xhci: Fix kernel oops in trace_xhci_free_virt_device
xhci: Fix perceived dead host due to runtime suspend race with event handler
dwc2: gadget: Fix ISOC IN DDMA PID bitfield value calculation
usb: gadget: dwc2: fix memory leak in gadget_init()
usb: gadget: composite: fix delayed_status race condition when set_interface
usb: dwc2: fix isoc split in transfer with no data
usb: dwc2: alloc dma aligned buffer for isoc split in
usb: dwc2: fix the incorrect bitmaps for the ports of multi_tt hub
...
Ilpo Järvinen [Fri, 29 Jun 2018 10:07:53 +0000 (13:07 +0300)]
tcp: prevent bogus FRTO undos with non-SACK flows
If SACK is not enabled and the first cumulative ACK after the RTO
retransmission covers more than the retransmitted skb, a spurious
FRTO undo will trigger (assuming FRTO is enabled for that RTO).
The reason is that any non-retransmitted segment acknowledged will
set FLAG_ORIG_SACK_ACKED in tcp_clean_rtx_queue even if there is
no indication that it would have been delivered for real (the
scoreboard is not kept with TCPCB_SACKED_ACKED bits in the non-SACK
case so the check for that bit won't help like it does with SACK).
Having FLAG_ORIG_SACK_ACKED set results in the spurious FRTO undo
in tcp_process_loss.
We need to use more strict condition for non-SACK case and check
that none of the cumulatively ACKed segments were retransmitted
to prove that progress is due to original transmissions. Only then
keep FLAG_ORIG_SACK_ACKED set, allowing FRTO undo to proceed in
non-SACK case.
(FLAG_ORIG_SACK_ACKED is planned to be renamed to FLAG_ORIG_PROGRESS
to better indicate its purpose but to keep this change minimal, it
will be done in another patch).
Besides burstiness and congestion control violations, this problem
can result in RTO loop: When the loss recovery is prematurely
undoed, only new data will be transmitted (if available) and
the next retransmission can occur only after a new RTO which in case
of multiple losses (that are not for consecutive packets) requires
one RTO per loss to recover.
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> Tested-by: Neal Cardwell <ncardwell@google.com> Acked-by: Neal Cardwell <ncardwell@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Originally in patch e6d20c55a4 ("openrisc: entry: Fix delay slot
detection") I fixed delay slot detection, but only for QEMU. We missed
that hardware delay slot detection using delay slot exception flag (DSX)
was still broken. This was because QEMU set the DSX flag in both
pre-exception supervision register (ESR) and supervision register (SR)
register, but on real hardware the DSX flag is only set on the SR
register during exceptions.
Fix this by carrying the DSX flag into the SR register during exception.
We also update the DSX flag read locations to read the value from the SR
register not the pt_regs SR register which represents ESR. The ESR
should never have the DSX flag set.
In the process I updated/removed a few comments to match the current
state. Including removing a comment saying that the DSX detection logic
was inefficient and needed to be rewritten.
I have tested this on QEMU with a patch ensuring it matches the hardware
specification.
The following pull-request contains BPF updates for your *net* tree.
The main changes are:
1) A bpf_fib_lookup() helper fix to change the API before freeze to
return an encoding of the FIB lookup result and return the nexthop
device index in the params struct (instead of device index as return
code that we had before), from David.
2) Various BPF JIT fixes to address syzkaller fallout, that is, do not
reject progs when set_memory_*() fails since it could still be RO.
Also arm32 JIT was not using bpf_jit_binary_lock_ro() API which was
an issue, and a memory leak in s390 JIT found during review, from
Daniel.
3) Multiple fixes for sockmap/hash to address most of the syzkaller
triggered bugs. Usage with IPv6 was crashing, a GPF in bpf_tcp_close(),
a missing sock_map_release() routine to hook up to callbacks, and a
fix for an omitted bucket lock in sock_close(), from John.
4) Two bpftool fixes to remove duplicated error message on program load,
and another one to close the libbpf object after program load. One
additional fix for nfp driver's BPF offload to avoid stopping offload
completely if replace of program failed, from Jakub.
5) Couple of BPF selftest fixes that bail out in some of the test
scripts if the user does not have the right privileges, from Jeffrin.
6) Fixes in test_bpf for s390 when CONFIG_BPF_JIT_ALWAYS_ON is set
where we need to set the flag that some of the test cases are expected
to fail, from Kleber.
7) Fix to detangle BPF_LIRC_MODE2 dependency from CONFIG_CGROUP_BPF
since it has no relation to it and lirc2 users often have configs
without cgroups enabled and thus would not be able to use it, from Sean.
8) Fix a selftest failure in sockmap by removing a useless setrlimit()
call that would set a too low limit where at the same time we are
already including bpf_rlimit.h that does the job, from Yonghong.
9) Fix BPF selftest config with missing missing NET_SCHED, from Anders.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Daniel Borkmann [Sat, 30 Jun 2018 23:21:32 +0000 (01:21 +0200)]
Merge branch 'bpf-sockmap-fixes'
John Fastabend says:
====================
This addresses two syzbot issues that lead to identifying (by Eric and
Wei) a class of bugs where we don't correctly check for IPv4/v6
sockets and their associated state. The second issue was a locking
omission in sockhash.
The first patch addresses IPv6 socks and fixing an error where
sockhash would overwrite the prot pointer with IPv4 prot. To fix
this build similar solution to TLS ULP. Although we continue to
allow socks in all states not just ESTABLISH in this patch set
because as Martin points out there should be no issue with this
on the sockmap ULP because we don't use the ctx in this code. Once
multiple ULPs coexist we may need to revisit this. However we
can do this in *next trees.
The other issue syzbot found that the tcp_close() handler missed
locking the hash bucket lock which could result in corrupting the
sockhash bucket list if delete and close ran at the same time.
And also the smap_list_remove() routine was not working correctly
at all. This was not caught in my testing because in general my
tests (to date at least lets add some more robust selftest in
bpf-next) do things in the "expected" order, create map, add socks,
delete socks, then tear down maps. The tests we have that do the
ops out of this order where only working on single maps not multi-
maps so we never saw the issue. Thanks syzbot. The fix is to
restructure the tcp_close() lock handling. And fix the obvious
bug in smap_list_remove().
Finally, during review I noticed the release handler was omitted
from the upstream code (patch 4) due to an incorrect merge conflict
fix when I ported the code to latest bpf-next before submitting.
This would leave references to the map around if the user never
closes the map.
v3: rework patches, dropping ESTABLISH check and adding rcu
annotation along with the smap_list_remove fix
v4: missed one more case where maps was being accessed without
the sk_callback_lock, spoted by Martin as well.
v5: changed to use a specific lock for maps and reduced callback
lock so that it is only used to gaurd sk callbacks. I think
this makes the logic a bit cleaner and avoids confusion
ovoer what each lock is doing.
Also big thanks to Martin for thorough review he caught at least
one case where I missed a rcu_call().
====================
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
John Fastabend [Sat, 30 Jun 2018 13:17:47 +0000 (06:17 -0700)]
bpf: sockhash fix omitted bucket lock in sock_close
First the sk_callback_lock() was being used to protect both the
sock callback hooks and the psock->maps list. This got overly
convoluted after the addition of sockhash (in sockmap it made
some sense because masp and callbacks were tightly coupled) so
lets split out a specific lock for maps and only use the callback
lock for its intended purpose. This fixes a couple cases where
we missed using maps lock when it was in fact needed. Also this
makes it easier to follow the code because now we can put the
locking closer to the actual code its serializing.
Next, in sock_hash_delete_elem() the pattern was as follows,
sock_hash_delete_elem()
[...]
spin_lock(bucket_lock)
l = lookup_elem_raw()
if (l)
hlist_del_rcu()
write_lock(sk_callback_lock)
.... destroy psock ...
write_unlock(sk_callback_lock)
spin_unlock(bucket_lock)
The ordering is necessary because we only know the {p}sock after
dereferencing the hash table which we can't do unless we have the
bucket lock held. Once we have the bucket lock and the psock element
it is deleted from the hashmap to ensure any other path doing a lookup
will fail. Finally, the refcnt is decremented and if zero the psock
is destroyed.
In parallel with the above (or free'ing the map) a tcp close event
may trigger tcp_close(). Which at the moment omits the bucket lock
altogether (oops!) where the flow looks like this,
bpf_tcp_close()
[...]
write_lock(sk_callback_lock)
for each psock->maps // list of maps this sock is part of
hlist_del_rcu(ref_hash_node);
.... destroy psock ...
write_unlock(sk_callback_lock)
Obviously, and demonstrated by syzbot, this is broken because
we can have multiple threads deleting entries via hlist_del_rcu().
To fix this we might be tempted to wrap the hlist operation in a
bucket lock but that would create a lock inversion problem. In
summary to follow locking rules the psocks maps list needs the
sk_callback_lock (after this patch maps_lock) but we need the bucket
lock to do the hlist_del_rcu.
To resolve the lock inversion problem pop the head of the maps list
repeatedly and remove the reference until no more are left. If a
delete happens in parallel from the BPF API that is OK as well because
it will do a similar action, lookup the lock in the map/hash, delete
it from the map/hash, and dec the refcnt. We check for this case
before doing a destroy on the psock to ensure we don't have two
threads tearing down a psock. The new logic is as follows,
bpf_tcp_close()
e = psock_map_pop(psock->maps) // done with map lock
bucket_lock() // lock hash list bucket
l = lookup_elem_raw(head, hash, key, key_size);
if (l) {
//only get here if elmnt was not already removed
hlist_del_rcu()
... destroy psock...
}
bucket_unlock()
And finally for all the above to work add missing locking around map
operations per above. Then add RCU annotations and use
rcu_dereference/rcu_assign_pointer to manage values relying on RCU so
that the object is not free'd from sock_hash_free() while it is being
referenced in bpf_tcp_close().
Reported-by: syzbot+0ce137753c78f7b6acc1@syzkaller.appspotmail.com Fixes: 81110384441a ("bpf: sockmap, add hash map support") Signed-off-by: John Fastabend <john.fastabend@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
John Fastabend [Sat, 30 Jun 2018 13:17:41 +0000 (06:17 -0700)]
bpf: sockmap, fix smap_list_map_remove when psock is in many maps
If a hashmap is free'd with open socks it removes the reference to
the hash entry from the psock. If that is the last reference to the
psock then it will also be free'd by the reference counting logic.
However the current logic that removes the hash reference from the
list of references is broken. In smap_list_remove() we first check
if the sockmap entry matches and then check if the hashmap entry
matches. But, the sockmap entry sill always match because its NULL in
this case which causes the first entry to be removed from the list.
If this is always the "right" entry (because the user adds/removes
entries in order) then everything is OK but otherwise a subsequent
bpf_tcp_close() may reference a free'd object.
To fix this create two list handlers one for sockmap and one for
sockhash.
Reported-by: syzbot+0ce137753c78f7b6acc1@syzkaller.appspotmail.com Fixes: 81110384441a ("bpf: sockmap, add hash map support") Acked-by: Martin KaFai Lau <kafai@fb.com> Signed-off-by: John Fastabend <john.fastabend@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
John Fastabend [Sat, 30 Jun 2018 13:17:36 +0000 (06:17 -0700)]
bpf: sockmap, fix crash when ipv6 sock is added
This fixes a crash where we assign tcp_prot to IPv6 sockets instead
of tcpv6_prot.
Previously we overwrote the sk->prot field with tcp_prot even in the
AF_INET6 case. This patch ensures the correct tcp_prot and tcpv6_prot
are used.
Tested with 'netserver -6' and 'netperf -H [IPv6]' as well as
'netperf -H [IPv4]'. The ESTABLISHED check resolves the previously
crashing case here.
Fixes: 174a79ff9515 ("bpf: sockmap with sk redirect support") Reported-by: syzbot+5c063698bdbfac19f363@syzkaller.appspotmail.com Acked-by: Martin KaFai Lau <kafai@fb.com> Signed-off-by: John Fastabend <john.fastabend@gmail.com> Signed-off-by: Wei Wang <weiwan@google.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Linus Torvalds [Sat, 30 Jun 2018 21:16:30 +0000 (14:16 -0700)]
Merge branch 'parisc-4.18-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux
Pull parisc fixes and cleanups from Helge Deller:
"Nothing exiting in this patchset, just
- small cleanups of header files
- default to 4 CPUs when building a SMP kernel
- mark 16kB and 64kB page sizes broken
- addition of the new io_pgetevents syscall"
* 'parisc-4.18-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
parisc: Build kernel without -ffunction-sections
parisc: Reduce debug output in unwind code
parisc: Wire up io_pgetevents syscall
parisc: Default to 4 SMP CPUs
parisc: Convert printk(KERN_LEVEL) to pr_lvl()
parisc: Mark 16kB and 64kB page sizes BROKEN
parisc: Drop struct sigaction from not exported header file
Linus Torvalds [Sat, 30 Jun 2018 20:05:30 +0000 (13:05 -0700)]
Merge tag 'kbuild-fixes-v4.18' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kbuild fixes from Masahiro Yamada:
- introduce __diag_* macros and suppress -Wattribute-alias warnings
from GCC 8
- fix stack protector test script for x86_64
- fix line number handling in Kconfig
- document that '#' starts a comment in Kconfig
- handle P_SYMBOL property in dump debugging of Kconfig
- correct help message of LD_DEAD_CODE_DATA_ELIMINATION
- fix occasional segmentation faults in Kconfig
* tag 'kbuild-fixes-v4.18' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
kconfig: loop boundary condition fix
kbuild: reword help of LD_DEAD_CODE_DATA_ELIMINATION
kconfig: handle P_SYMBOL in print_symbol()
kconfig: document Kconfig source file comments
kconfig: fix line numbers for if-entries in menu tree
stack-protector: Fix test with 32-bit userland and CONFIG_64BIT=y
powerpc: Remove -Wattribute-alias pragmas
disable -Wattribute-alias warning for SYSCALL_DEFINEx()
kbuild: add macro for controlling warnings to linux/compiler.h
Linus Torvalds [Sat, 30 Jun 2018 18:42:14 +0000 (11:42 -0700)]
Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Ingo Molnar:
"The biggest diffstat comes from self-test updates, plus there's entry
code fixes, 5-level paging related fixes, console debug output fixes,
and misc fixes"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/mm: Clean up the printk()s in show_fault_oops()
x86/mm: Drop unneeded __always_inline for p4d page table helpers
x86/efi: Fix efi_call_phys_epilog() with CONFIG_X86_5LEVEL=y
selftests/x86/sigreturn: Do minor cleanups
selftests/x86/sigreturn/64: Fix spurious failures on AMD CPUs
x86/entry/64/compat: Fix "x86/entry/64/compat: Preserve r8-r11 in int $0x80"
x86/mm: Don't free P4D table when it is folded at runtime
x86/entry/32: Add explicit 'l' instruction suffix
x86/mm: Get rid of KERN_CONT in show_fault_oops()
Linus Torvalds [Sat, 30 Jun 2018 18:26:25 +0000 (11:26 -0700)]
Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fixes from Ingo Molnar:
"Tooling fixes mostly, plus a build warning fix"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (21 commits)
perf/core: Move inline keyword at the beginning of declaration
tools/headers: Pick up latest kernel ABIs
perf tools: Fix crash caused by accessing feat_ops[HEADER_LAST_FEATURE]
perf script: Fix crash because of missing evsel->priv
perf script: Add missing output fields in a hint
perf bench: Fix numa report output code
perf stat: Remove duplicate event counting
perf alias: Rebuild alias expression string to make it comparable
perf alias: Remove trailing newline when reading sysfs files
perf tools: Fix a clang 7.0 compilation error
tools include uapi: Synchronize bpf.h with the kernel
tools include uapi: Update if_link.h to pick IFLA_{BRPORT_ISOLATED,VXLAN_TTL_INHERIT}
tools include powerpc: Update arch/powerpc/include/uapi/asm/unistd.h copy to get 'rseq' syscall
perf tools: Update x86's syscall_64.tbl, adding 'io_pgetevents' and 'rseq'
tools headers uapi: Synchronize drm/drm.h
perf intel-pt: Fix packet decoding of CYC packets
perf tests: Add valid callback for parse-events test
perf tests: Add event parsing error handling to parse events test
perf report powerpc: Fix crash if callchain is empty
perf test session topology: Fix test on s390
...
Linus Torvalds [Sat, 30 Jun 2018 18:15:12 +0000 (11:15 -0700)]
Merge tag 'selinux-pr-20180629' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux
Pull selinux fix from Paul Moore:
"One fairly straightforward patch to fix a longstanding issue where a
process could stall while accessing files in selinuxfs and block
everyone else due to a held mutex.
The patch passes all our tests and looks to apply cleanly to your
current tree"
* tag 'selinux-pr-20180629' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux:
selinux: move user accesses in selinuxfs out of locked regions
Linus Torvalds [Sat, 30 Jun 2018 17:47:46 +0000 (10:47 -0700)]
Merge tag 'for-linus-20180629' of git://git.kernel.dk/linux-block
Pull block fixes from Jens Axboe:
"Small set of fixes for this series. Mostly just minor fixes, the only
oddball in here is the sg change.
The sg change came out of the stall fix for NVMe, where we added a
mempool and limited us to a single page allocation. CONFIG_SG_DEBUG
sort-of ruins that, since we'd need to account for that. That's
actually a generic problem, since lots of drivers need to allocate SG
lists. So this just removes support for CONFIG_SG_DEBUG, which I added
back in 2007 and to my knowledge it was never useful.
Anyway, outside of that, this pull contains:
- clone of request with special payload fix (Bart)
- drbd discard handling fix (Bart)
- SATA blk-mq stall fix (me)
- chunk size fix (Keith)
- double free nvme rdma fix (Sagi)"
* tag 'for-linus-20180629' of git://git.kernel.dk/linux-block:
sg: remove ->sg_magic member
drbd: Fix drbd_request_prepare() discard handling
blk-mq: don't queue more if we get a busy return
block: Fix cloning of requests with a special payload
nvme-rdma: fix possible double free of controller async event buffer
block: Fix transfer when chunk sectors exceeds max
Roopa Prabhu [Fri, 29 Jun 2018 21:32:15 +0000 (14:32 -0700)]
net: fib_rules: bring back rule_exists to match rule during add
After commit f9d4b0c1e969 ("fib_rules: move common handling of newrule
delrule msgs into fib_nl2rule"), rule_exists got replaced by rule_find
for existing rule lookup in both the add and del paths. While this
is good for the delete path, it solves a few problems but opens up
a few invalid key matches in the add path.
$ip -4 rule add table main tos 10 fwmark 1
$ip -4 rule add table main tos 10
RTNETLINK answers: File exists
The problem here is rule_find does not check if the key masks in
the new and old rule are the same and hence ends up matching a more
secific rule. Rule key masks cannot be easily compared today without
an elaborate if-else block. Its best to introduce key masks for easier
and accurate rule comparison in the future. Until then, due to fear of
regressions this patch re-introduces older loose rule_exists during add.
Also fixes both rule_exists and rule_find to cover missing attributes.
Fixes: f9d4b0c1e969 ("fib_rules: move common handling of newrule delrule msgs into fib_nl2rule") Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
hv_netvsc: split sub-channel setup into async and sync
When doing device hotplug the sub channel must be async to avoid
deadlock issues because device is discovered in softirq context.
When doing changes to MTU and number of channels, the setup
must be synchronous to avoid races such as when MTU and device
settings are done in a single ip command.
Reported-by: Thomas Walker <Thomas.Walker@twosigma.com> Fixes: 8195b1396ec8 ("hv_netvsc: fix deadlock on hotplug") Fixes: 732e49850c5e ("netvsc: fix race on sub channel creation") Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com> Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Cong Wang [Fri, 29 Jun 2018 20:42:48 +0000 (13:42 -0700)]
net: use dev_change_tx_queue_len() for SIOCSIFTXQLEN
As noticed by Eric, we need to switch to the helper
dev_change_tx_queue_len() for SIOCSIFTXQLEN call path too,
otheriwse still miss dev_qdisc_change_tx_queue_len().
Fixes: 6a643ddb5624 ("net: introduce helper dev_change_tx_queue_len()") Reported-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Reviewed-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Fix this by sanitizing pool before using it to index
zatm_dev->pool_info
Notice that given that speculation windows are large, the policy is
to kill the speculation on the first load and not worry if it can be
completed with a dependent load/store [1].
David S. Miller [Sat, 30 Jun 2018 12:19:55 +0000 (21:19 +0900)]
Merge branch 's390-qeth-fixes'
Julian Wiedmann says:
====================
s390/qeth: fixes 2018-06-29
please apply a few qeth fixes for -net and your 4.17 stable queue.
Patches 1-3 fix several issues wrt to MAC address management that were
introduced during the 4.17 cycle.
Patch 4 tackles a long-standing issue with busy multi-connection workloads
on devices in af_iucv mode.
Patch 5 makes sure to re-enable all active HW offloads, after a card was
previously set offline and thus lost its HW context.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Julian Wiedmann [Fri, 29 Jun 2018 17:45:54 +0000 (19:45 +0200)]
s390/qeth: consistently re-enable device features
commit e830baa9c3f0 ("qeth: restore device features after recovery") and
commit ce3443564145 ("s390/qeth: rely on kernel for feature recovery")
made sure that the HW functions for device features get re-programmed
after recovery.
But we missed that the same handling is also required when a card is
first set offline (destroying all HW context), and then online again.
Fix this by moving the re-enable action out of the recovery-only path.
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Julian Wiedmann [Fri, 29 Jun 2018 17:45:53 +0000 (19:45 +0200)]
s390/qeth: don't clobber buffer on async TX completion
If qeth_qdio_output_handler() detects that a transmit requires async
completion, it replaces the pending buffer's metadata object
(qeth_qdio_out_buffer) so that this queue buffer can be re-used while
the data is pending completion.
Later when the CQ indicates async completion of such a metadata object,
qeth_qdio_cq_handler() tries to free any data associated with this
object (since HW has now completed the transfer). By calling
qeth_clear_output_buffer(), it erronously operates on the queue buffer
that _previously_ belonged to this transfer ... but which has been
potentially re-used several times by now.
This results in double-free's of the buffer's data, and failing
transmits as the buffer descriptor is scrubbed in mid-air.
The correct way of handling this situation is to
1. scrub the queue buffer when it is prepared for re-use, and
2. later obtain the data addresses from the async-completion notifier
(ie. the AOB), instead of the queue buffer.
All this only affects qeth devices used for af_iucv HiperTransport.
Fixes: 0da9581ddb0f ("qeth: exploit asynchronous delivery of storage blocks") Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Vasily Gorbik [Fri, 29 Jun 2018 17:45:52 +0000 (19:45 +0200)]
s390/qeth: avoid using is_multicast_ether_addr_64bits on (u8 *)[6]
*ether_addr*_64bits functions have been introduced to optimize
performance critical paths, which access 6-byte ethernet address as u64
value to get "nice" assembly. A harmless hack works nicely on ethernet
addresses shoved into a structure or a larger buffer, until busted by
Kasan on smth like plain (u8 *)[6].
qeth_l2_set_mac_address calls qeth_l2_remove_mac passing
u8 old_addr[ETH_ALEN] as an argument.
Adding/removing macs for an ethernet adapter is not that performance
critical. Moreover is_multicast_ether_addr_64bits itself on s390 is not
faster than is_multicast_ether_addr:
Julian Wiedmann [Fri, 29 Jun 2018 17:45:51 +0000 (19:45 +0200)]
s390/qeth: fix race when setting MAC address
When qeth_l2_set_mac_address() finds the card in a non-reachable state,
it merely copies the new MAC address into dev->dev_addr so that
__qeth_l2_set_online() can later register it with the HW.
But __qeth_l2_set_online() may very well be running concurrently, so we
can't trust the card state without appropriate locking:
If the online sequence is past the point where it registers
dev->dev_addr (but not yet in SOFTSETUP state), any address change needs
to be properly programmed into the HW. Otherwise the netdevice ends up
with a different MAC address than what's set in the HW, and inbound
traffic is not forwarded as expected.
This is most likely to occur for OSD in LPAR, where
commit 21b1702af12e ("s390/qeth: improve fallback to random MAC address")
now triggers eg. systemd to immediately change the MAC when the netdevice
is registered with a NET_ADDR_RANDOM address.
Fixes: bcacfcbc82b4 ("s390/qeth: fix MAC address update sequence") Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
On its own, querying RDEV for a MAC address works fine. But when upgrading
from a qeth that previously queried DDEV on a z/VM NIC (ie. any kernel with
commit ec61bd2fd2a2), the RDEV query now returns a _different_ MAC address
than the DDEV query.
If the NIC is configured with MACPROTECT, z/VM apparently requires us to
use the MAC that was initially returned (on DDEV) and registered. So after
upgrading to a kernel that uses RDEV, the SETVMAC registration cmd for the
new MAC address fails and we end up with a non-operabel interface.
To avoid regressions on upgrade, switch back to using DDEV for the MAC
address query. The downgrade path (first RDEV, later DDEV) is fine, in this
case both queries return the same MAC address.
Fixes: b7493e91c11a ("s390/qeth: use Read device to query hypervisor for MAC") Reported-by: Michal Kubecek <mkubecek@suse.com> Tested-by: Karsten Graul <kgraul@linux.ibm.com> Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Sabrina Dubroca [Fri, 29 Jun 2018 15:51:26 +0000 (17:51 +0200)]
alx: take rtnl before calling __alx_open from resume
The __alx_open function can be called from ndo_open, which is called
under RTNL, or from alx_resume, which isn't. Since commit d768319cd427,
we're calling the netif_set_real_num_{tx,rx}_queues functions, which
need to be called under RTNL.
This is similar to commit 0c2cc02e571a ("igb: Move the calls to set the
Tx and Rx queues into igb_open").
Fixes: d768319cd427 ("alx: enable multiple tx queues") Signed-off-by: Sabrina Dubroca <sd@queasysnail.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Bert Kenward [Fri, 29 Jun 2018 15:29:28 +0000 (16:29 +0100)]
sfc: correctly initialise filter rwsem for farch
Fixes: fc7a6c287ff3 ("sfc: use a semaphore to lock farch filters too") Suggested-by: Joseph Korty <joe.korty@concurrent-rt.com> Signed-off-by: Bert Kenward <bkenward@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Dan Murphy [Fri, 29 Jun 2018 15:28:31 +0000 (10:28 -0500)]
net: phy: DP83TC811: Fix disabling interrupts
Fix a bug where INT_STAT1 was written twice and
INT_STAT2 was ignored when disabling interrupts.
Fixes: b753a9faaf9a ("net: phy: DP83TC811: Introduce support for the DP83TC811 phy") Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Dan Murphy <dmurphy@ti.com> Signed-off-by: David S. Miller <davem@davemloft.net>
David Ahern [Thu, 28 Jun 2018 20:36:55 +0000 (13:36 -0700)]
net/ipv6: Fix updates to prefix route
Sowmini reported that a recent commit broke prefix routes for linklocal
addresses. The newly added modify_prefix_route is attempting to add a
new prefix route when the ifp priority does not match the route metric
however the check needs to account for the default priority. In addition,
the route add fails because the route already exists, and then the delete
removes the one that exists. Flip the order to do the delete first.
Fixes: 8308f3ff1753 ("net/ipv6: Add support for specifying metric of connected routes") Reported-by: Sowmini Varadhan <sowmini.varadhan@oracle.com> Tested-by: Sowmini Varadhan <sowmini.varadhan@oracle.com> Signed-off-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Michal Hocko [Thu, 28 Jun 2018 15:53:06 +0000 (17:53 +0200)]
net: cleanup gfp mask in alloc_skb_with_frags
alloc_skb_with_frags uses __GFP_NORETRY for non-sleeping allocations
which is just a noop and a little bit confusing.
__GFP_NORETRY was added by ed98df3361f0 ("net: use __GFP_NORETRY for
high order allocations") to prevent from the OOM killer. Yet this was
not enough because fb05e7a89f50 ("net: don't wait for order-3 page
allocation") didn't want an excessive reclaim for non-costly orders
so it made it completely NOWAIT while it preserved __GFP_NORETRY in
place which is now redundant.
Drop the pointless __GFP_NORETRY because this function is used as
copy&paste source for other places.
Reviewed-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Michal Hocko <mhocko@suse.com> Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Sat, 30 Jun 2018 09:51:06 +0000 (18:51 +0900)]
Merge branch 'DPAA-fixes'
Madalin Bucur says:
====================
DPAA fixes
A couple of fixes for the DPAA drivers, addressing an issue
with short UDP or TCP frames (with padding) that were marked
as having a wrong checksum and dropped by the FMan hardware
and a problem with the buffer used for the scatter-gather
table being too small as per the hardware requirements.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Madalin Bucur [Thu, 28 Jun 2018 12:26:51 +0000 (15:26 +0300)]
dpaa_eth: DPAA SGT needs to be 256B
The DPAA HW requires that at least 256 bytes from the start of the
first scatter-gather table entry are allocated and accessible. The
hardware reads the maximum size the table can have in one access,
thus requiring that the allocation and mapping to be done for the
maximum size of 256B even if there is a smaller number of entries
in the table.
Signed-off-by: Madalin Bucur <madalin.bucur@nxp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Madalin Bucur [Thu, 28 Jun 2018 12:26:50 +0000 (15:26 +0300)]
fsl/fman: fix parser reporting bad checksum on short frames
The FMan hardware parser needs to be configured to remove the
short frame padding from the checksum calculation, otherwise
short UDP and TCP frames are likely to be marked as having a
bad checksum.
Signed-off-by: Madalin Bucur <madalin.bucur@nxp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
bnx2x: Fix receiving tx-timeout in error or recovery state.
Driver performs the internal reload when it receives tx-timeout event from
the OS. Internal reload might fail in some scenarios e.g., fatal HW issues.
In such cases OS still see the link, which would result in undesirable
functionalities such as re-generation of tx-timeouts.
The patch addresses this issue by indicating the link-down to OS when
tx-timeout is detected, and keeping the link in down state till the
internal reload is successful.
Please consider applying it to 'net' branch.
Signed-off-by: Sudarsana Reddy Kalluru <Sudarsana.Kalluru@cavium.com> Signed-off-by: Ariel Elior <ariel.elior@cavium.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Dan Carpenter [Thu, 28 Jun 2018 09:31:25 +0000 (12:31 +0300)]
cnic: tidy up a size calculation
Static checkers complain that id_tbl->table points to longs and 4 bytes
is smaller than sizeof(long). But the since other side is dividing by
32 instead of sizeof(long), that means the current code works fine.
Anyway, it's more conventional to use the BITS_TO_LONGS() macro when
we're allocating a bitmap.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Yuchung Cheng [Wed, 27 Jun 2018 23:04:48 +0000 (16:04 -0700)]
tcp: fix Fast Open key endianness
Fast Open key could be stored in different endian based on the CPU.
Previously hosts in different endianness in a server farm using
the same key config (sysctl value) would produce different cookies.
This patch fixes it by always storing it as little endian to keep
same API for LE hosts.
Reported-by: Daniele Iamartino <danielei@google.com> Signed-off-by: Yuchung Cheng <ycheng@google.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Neal Cardwell <ncardwell@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Olof Johansson [Fri, 29 Jun 2018 21:06:49 +0000 (14:06 -0700)]
Merge tag 'hisi-fixes-for-4.18' of git://github.com/hisilicon/linux-hisi into fixes
ARM64: hisi fixes for 4.18
- Added power capabilities for the mmc host controller on the
hikey and hikey960 boards to avoid broken wifi.
* tag 'hisi-fixes-for-4.18' of git://github.com/hisilicon/linux-hisi:
arm64: dts: hikey960: Define wl1837 power capabilities
arm64: dts: hikey: Define wl1835 power capabilities
Linus Torvalds [Fri, 29 Jun 2018 19:25:26 +0000 (12:25 -0700)]
Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fixes from Catalin Marinas:
- The alternatives patching code uses flush_icache_range() which itself
uses alternatives. Change the code to use an unpatched variant of
cache maintenance
- Remove unnecessary ISBs from set_{pte,pmd,pud}
- perf: xgene_pmu: Fix IOB SLOW PMU parser error
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64: Remove unnecessary ISBs from set_{pte,pmd,pud}
arm64: Avoid flush_icache_range() in alternatives patching code
drivers/perf: xgene_pmu: Fix IOB SLOW PMU parser error
Linus Torvalds [Fri, 29 Jun 2018 19:21:12 +0000 (12:21 -0700)]
Merge branch 'i2c/for-current-fixed' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
Pull i2c fixes from Wolfram Sang:
- a revert because of bugzilla #200045 (and some documentation about
it)
- another regression fix in the i2c-gpio driver
- a leak fix for the i2c core
* 'i2c/for-current-fixed' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
i2c: gpio: initialize SCL to HIGH again
i2c: smbus: kill memory leak on emulated and failed DMA SMBus xfers
i2c: algos: bit: mention our experience about initial states
Revert "i2c: algo-bit: init the bus to a known state"
====================
This set contains three fixes that are mostly JIT and set_memory_*()
related. The third in the series in particular fixes the syzkaller
bugs that were still pending; aside from local reproduction & testing,
also 'syz test' wasn't able to trigger them anymore. I've tested this
series on x86_64, arm64 and s390x, and kbuild bot wasn't yelling either
for the rest. For details, please see patches as usual, thanks!
====================
Daniel Borkmann [Thu, 28 Jun 2018 21:34:59 +0000 (23:34 +0200)]
bpf: undo prog rejection on read-only lock failure
Partially undo commit 9facc336876f ("bpf: reject any prog that failed
read-only lock") since it caused a regression, that is, syzkaller was
able to manage to cause a panic via fault injection deep in set_memory_ro()
path by letting an allocation fail: In x86's __change_page_attr_set_clr()
it was able to change the attributes of the primary mapping but not in
the alias mapping via cpa_process_alias(), so the second, inner call
to the __change_page_attr() via __change_page_attr_set_clr() had to split
a larger page and failed in the alloc_pages() with the artifically triggered
allocation error which is then propagated down to the call site.
Thus, for set_memory_ro() this means that it returned with an error, but
from debugging a probe_kernel_write() revealed EFAULT on that memory since
the primary mapping succeeded to get changed. Therefore the subsequent
hdr->locked = 0 reset triggered the panic as it was performed on read-only
memory, so call-site assumptions were infact wrong to assume that it would
either succeed /or/ not succeed at all since there's no such rollback in
set_memory_*() calls from partial change of mappings, in other words, we're
left in a state that is "half done". A later undo via set_memory_rw() is
succeeding though due to matching permissions on that part (aka due to the
try_preserve_large_page() succeeding). While reproducing locally with
explicitly triggering this error, the initial splitting only happens on
rare occasions and in real world it would additionally need oom conditions,
but that said, it could partially fail. Therefore, it is definitely wrong
to bail out on set_memory_ro() error and reject the program with the
set_memory_*() semantics we have today. Shouldn't have gone the extra mile
since no other user in tree today infact checks for any set_memory_*()
errors, e.g. neither module_enable_ro() / module_disable_ro() for module
RO/NX handling which is mostly default these days nor kprobes core with
alloc_insn_page() / free_insn_page() as examples that could be invoked long
after bootup and original 314beb9bcabf ("x86: bpf_jit_comp: secure bpf jit
against spraying attacks") did neither when it got first introduced to BPF
so "improving" with bailing out was clearly not right when set_memory_*()
cannot handle it today.
Kees suggested that if set_memory_*() can fail, we should annotate it with
__must_check, and all callers need to deal with it gracefully given those
set_memory_*() markings aren't "advisory", but they're expected to actually
do what they say. This might be an option worth to move forward in future
but would at the same time require that set_memory_*() calls from supporting
archs are guaranteed to be "atomic" in that they provide rollback if part
of the range fails, once that happened, the transition from RW -> RO could
be made more robust that way, while subsequent RO -> RW transition /must/
continue guaranteeing to always succeed the undo part.
Reported-by: syzbot+a4eb8c7766952a1ca872@syzkaller.appspotmail.com Reported-by: syzbot+d866d1925855328eac3b@syzkaller.appspotmail.com Fixes: 9facc336876f ("bpf: reject any prog that failed read-only lock") Cc: Laura Abbott <labbott@redhat.com> Cc: Kees Cook <keescook@chromium.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Daniel Borkmann [Thu, 28 Jun 2018 21:34:58 +0000 (23:34 +0200)]
bpf, s390: fix potential memleak when later bpf_jit_prog fails
If we would ever fail in the bpf_jit_prog() pass that writes the
actual insns to the image after we got header via bpf_jit_binary_alloc()
then we also need to make sure to free it through bpf_jit_binary_free()
again when bailing out. Given we had prior bpf_jit_prog() passes to
initially probe for clobbered registers, program size and to fill in
addrs arrray for jump targets, this is more of a theoretical one,
but at least make sure this doesn't break with future changes.
Daniel Borkmann [Thu, 28 Jun 2018 21:34:57 +0000 (23:34 +0200)]
bpf, arm32: fix to use bpf_jit_binary_lock_ro api
Any eBPF JIT that where its underlying arch supports ARCH_HAS_SET_MEMORY
would need to use bpf_jit_binary_{un,}lock_ro() pair instead of the
set_memory_{ro,rw}() pair directly as otherwise changes to the former
might break. arm32's eBPF conversion missed to change it, so fix this
up here.
As suggested by Nick Piggin it seems we can drop the -ffunction-sections
compile flag, now that the kernel uses thin archives. Testing with 32-
and 64-bit kernel showed no difference in kernel size.
Suggested-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Helge Deller <deller@gmx.de>
Jens Axboe [Fri, 29 Jun 2018 14:48:06 +0000 (08:48 -0600)]
sg: remove ->sg_magic member
This was introduced more than a decade ago when sg chaining was
added, but we never really caught anything with it. The scatterlist
entry size can be critical, since drivers allocate it, so remove
the magic member. Recently it's been triggering allocation stalls
and failures in NVMe.
Tested-by: Jordan Glover <Golden_Miller83@protonmail.ch> Acked-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
- Move PCI_DOMAINS selection to fix build regression (Lorenzo
Pieralisi)
* tag 'pci-v4.18-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
PCI: controller: Move PCI_DOMAINS selection to arch Kconfig
PCI: Initialize endpoint library before controllers
PCI: shpchp: Manage SHPC unconditionally on non-ACPI systems
Linus Torvalds [Fri, 29 Jun 2018 14:14:41 +0000 (07:14 -0700)]
Merge tag 'pm-4.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management fixes from Rafael Wysocki:
"These fix up recently added features (the Kryo cpufreq driver and
performance states coverage in the generic power domains framework),
add missing documentation for a recently added sysfs knob in the
intel_pstate driver and fix an error in its documentation.
Specifics:
- Fix the initialization time error handling in the recently added
Kryo cpufreq driver (Dan Carpenter).
- Fix up the recently added coverage of performance states in the
generic power domains (genpd) framework (Viresh Kumar).
- Add missing documentation of the new hwp_dynamic_boost sysfs knob
in the intel_pstate driver (Rafael Wysocki).
- Fix incorrect sysfs path in the intel_pstate driver documentation
(Rafael Wysocki)"
* tag 'pm-4.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
Documentation: intel_pstate: Describe hwp_dynamic_boost sysfs knob
Documentation: admin-guide: intel_pstate: Fix sysfs path
PM / Domains: Rename opp_node to np
PM / Domains: Fix return value of of_genpd_opp_to_performance_state()
cpufreq: qcom-kryo: Fix error handling in probe()
Linus Torvalds [Fri, 29 Jun 2018 14:11:03 +0000 (07:11 -0700)]
Merge tag 'drm-fixes-2018-06-29' of git://anongit.freedesktop.org/drm/drm
Pull drm fixes from Dave Airlie:
"Nothing too major this round:
- small set of mali-dp fixes
- single meson fix
- a bunch of amdgpu fixes (one makes non-4k page sizes not be a bad
experience)"
* tag 'drm-fixes-2018-06-29' of git://anongit.freedesktop.org/drm/drm:
drm/amd/display: release spinlock before committing updates to stream
drm/amdgpu:Support new VCN FW version naming convention
drm/amdgpu: fix UBSAN: Undefined behaviour for amdgpu_fence.c
drm/meson: Fix an un-handled error path in 'meson_drv_bind_master()'
drm/amdgpu: GPU vs CPU page size fixes in amdgpu_vm_bo_split_mapping
drm/amdgpu: Count disabled CRTCs in commit tail earlier
drm/mali-dp: Rectify the width and height passed to rotmem_required()
drm/arm/malidp: Preserve LAYER_FORMAT contents when setting format
drm: mali-dp: Enable Global SE interrupts mask for DP500
drm/arm/malidp: Ensure that the crtcs are shutdown before removing any encoder/connector
* tag 'for-4.18/dm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
dm: prevent DAX mounts if not supported
dax: check for QUEUE_FLAG_DAX in bdev_dax_supported()
pmem: only set QUEUE_FLAG_DAX for fsdax mode
dm thin: handle running out of data space vs concurrent discard
dm raid: don't use 'const' in function return
dm zoned: avoid triggering reclaim from inside dmz_map()
dm writecache: use 2-factor allocator arguments
dm thin metadata: remove needless work from __commit_transaction
dm: use bio_split() when splitting out the already processed bio
Jens Axboe [Thu, 28 Jun 2018 17:54:01 +0000 (11:54 -0600)]
blk-mq: don't queue more if we get a busy return
Some devices have different queue limits depending on the type of IO. A
classic case is SATA NCQ, where some commands can queue, but others
cannot. If we have NCQ commands inflight and encounter a non-queueable
command, the driver returns busy. Currently we attempt to dispatch more
from the scheduler, if we were able to queue some commands. But for the
case where we ended up stopping due to BUSY, we should not attempt to
retrieve more from the scheduler. If we do, we can get into a situation
where we attempt to queue a non-queueable command, get BUSY, then
successfully retrieve more commands from that scheduler and queue those.
This can repeat forever, starving the non-queuable command indefinitely.
Fix this by NOT attempting to pull more commands from the scheduler, if
we get a BUSY return. This should also be more optimal in terms of
letting requests stay in the scheduler for as long as possible, if we
get a BUSY due to the regular out-of-tags condition.
Reviewed-by: Omar Sandoval <osandov@fb.com> Reviewed-by: Ming Lei <ming.lei@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Avi Kivity [Fri, 29 Jun 2018 13:37:25 +0000 (15:37 +0200)]
aio: mark __aio_sigset::sigmask const
io_pgetevents() will not change the signal mask. Mark it const to make
it clear and to reduce the need for casts in user code.
Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Avi Kivity <avi@scylladb.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
[hch: reapply the patch that got incorrectly reverted] Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The big aio poll revert broke various network protocols that don't
implement ->poll as a patch in the aio poll serie removed sock_no_poll
and made the common code handle this case.
Reported-by: syzbot+57727883dbad76db2ef0@syzkaller.appspotmail.com Reported-by: syzbot+cdb0d3176b53d35ad454@syzkaller.appspotmail.com Reported-by: syzbot+2c7e8f74f8b2571c87e8@syzkaller.appspotmail.com Reported-by: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp> Fixes: a11e1d432b51 ("Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL") Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
David S. Miller [Fri, 29 Jun 2018 13:09:26 +0000 (22:09 +0900)]
Merge tag 'mac80211-for-davem-2018-06-29' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211
Johannes Berg says:
====================
Just three fixes:
* fix HT operation in mesh mode
* disable preemption in control frame TX
* check nla_parse_nested() return values
where missing (two places)
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Shakeel Butt [Wed, 27 Jun 2018 22:16:42 +0000 (15:16 -0700)]
net, mm: account sock objects to kmemcg
Currently the kernel accounts the memory for network traffic through
mem_cgroup_[un]charge_skmem() interface. However the memory accounted
only includes the truesize of sk_buff which does not include the size of
sock objects. In our production environment, with opt-out kmem
accounting, the sock kmem caches (TCP[v6], UDP[v6], RAW[v6], UNIX) are
among the top most charged kmem caches and consume a significant amount
of memory which can not be left as system overhead. So, this patch
converts the kmem caches of all sock objects to SLAB_ACCOUNT.
Signed-off-by: Shakeel Butt <shakeelb@google.com> Suggested-by: Eric Dumazet <edumazet@google.com> Reviewed-by: Kirill Tkhai <ktkhai@virtuozzo.com> Reviewed-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Bob Copeland [Mon, 25 Jun 2018 01:10:49 +0000 (21:10 -0400)]
nl80211: relax ht operation checks for mesh
Commit 9757235f451c, "nl80211: correct checks for
NL80211_MESHCONF_HT_OPMODE value") relaxed the range for the HT
operation field in meshconf, while also adding checks requiring
the non-greenfield and non-ht-sta bits to be set in certain
circumstances. The latter bit is actually reserved for mesh BSSes
according to Table 9-168 in 802.11-2016, so in fact it should not
be set.
wpa_supplicant sets these bits because the mesh and AP code share
the same implementation, but authsae does not. As a result, some
meshconf updates from authsae which set only the NONHT_MIXED
protection bits were being rejected.
In order to avoid breaking userspace by changing the rules again,
simply accept the values with or without the bits set, and mask
off the reserved bit to match the spec.
While in here, update the 802.11-2012 reference to 802.11-2016.
Fixes: 9757235f451c ("nl80211: correct checks for NL80211_MESHCONF_HT_OPMODE value") Cc: Masashi Honma <masashi.honma@gmail.com> Signed-off-by: Bob Copeland <bobcopeland@fb.com> Reviewed-by: Masashi Honma <masashi.honma@gmail.com> Reviewed-by: Masashi Honma <masashi.honma@gmail.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Denis Kenzior [Tue, 19 Jun 2018 15:39:50 +0000 (10:39 -0500)]
mac80211: disable BHs/preemption in ieee80211_tx_control_port()
On pre-emption enabled kernels the following print was being seen due to
missing local_bh_disable/local_bh_enable calls. mac80211 assumes that
pre-emption is disabled in the data path.
BUG: using smp_processor_id() in preemptible [00000000] code: iwd/517
caller is __ieee80211_subif_start_xmit+0x144/0x210 [mac80211]
[...]
Call Trace:
dump_stack+0x5c/0x80
check_preemption_disabled.cold.0+0x46/0x51
__ieee80211_subif_start_xmit+0x144/0x210 [mac80211]
Fixes: 911806491425 ("mac80211: Add support for tx_control_port") Signed-off-by: Denis Kenzior <denkenz@gmail.com>
[commit message rewrite, fixes tag] Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Wolfram Sang [Sat, 16 Jun 2018 13:37:57 +0000 (22:37 +0900)]
i2c: algos: bit: mention our experience about initial states
So, if somebody wants to re-implement this in the future, we pinpoint to
a problem case.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Acked-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Wolfram Sang [Sat, 16 Jun 2018 13:37:56 +0000 (22:37 +0900)]
Revert "i2c: algo-bit: init the bus to a known state"
This reverts commit 3e5f06bed72fe72166a6778f630241a893f67799. As per
bugzilla #200045, this caused a regression. I don't really see a way to
fix it without having the hardware. So, revert the patch and I will fix
the issue I was seeing originally in the i2c-gpio driver itself. I
couldn't find new users of this algorithm since, so there should be no
one depending on the new behaviour.
Reported-by: Sergey Larin <cerg2010cerg2010@mail.ru> Fixes: 3e5f06bed72f ("i2c: algo-bit: init the bus to a known state") Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Acked-by: Alex Deucher <alexander.deucher@amd.com> Tested-by: Sergey Larin <cerg2010cerg2010@mail.ru> Signed-off-by: Wolfram Sang <wsa@the-dreams.de> Cc: stable@kernel.org
Jann Horn [Fri, 29 Jun 2018 00:39:54 +0000 (20:39 -0400)]
selinux: move user accesses in selinuxfs out of locked regions
If a user is accessing a file in selinuxfs with a pointer to a userspace
buffer that is backed by e.g. a userfaultfd, the userspace access can
stall indefinitely, which can block fsi->mutex if it is held.
For sel_read_policy(), remove the locking, since this method doesn't seem
to access anything that requires locking.
For sel_read_bool(), move the user access below the locked region.
For sel_write_bool() and sel_commit_bools_write(), move the user access
up above the locked region.
Cc: stable@vger.kernel.org Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Jann Horn <jannh@google.com> Acked-by: Stephen Smalley <sds@tycho.nsa.gov>
[PM: removed an unused variable in sel_read_policy()] Signed-off-by: Paul Moore <paul@paul-moore.com>
David Ahern [Tue, 26 Jun 2018 23:21:18 +0000 (16:21 -0700)]
bpf: Change bpf_fib_lookup to return lookup status
For ACLs implemented using either FIB rules or FIB entries, the BPF
program needs the FIB lookup status to be able to drop the packet.
Since the bpf_fib_lookup API has not reached a released kernel yet,
change the return code to contain an encoding of the FIB lookup
result and return the nexthop device index in the params struct.
In addition, inform the BPF program of any post FIB lookup reason as
to why the packet needs to go up the stack.
The fib result for unicast routes must have an egress device, so remove
the check that it is non-NULL.
Signed-off-by: David Ahern <dsahern@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Flag with FLAG_EXPECTED_FAIL the BPF_MAXINSNS tests that cannot be jited
on s390 because they exceed BPF_SIZE_MAX and fail when
CONFIG_BPF_JIT_ALWAYS_ON is set. Also set .expected_errcode to -ENOTSUPP
so the tests pass in that case.
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com> Acked-by: Song Liu <songliubraving@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Dave Airlie [Thu, 28 Jun 2018 20:21:12 +0000 (06:21 +1000)]
Merge branch 'drm-fixes-4.18' of git://people.freedesktop.org/~agd5f/linux into drm-fixes
A few fixes for 4.18:
- fix a read past the end of an array due to vega20 changes
- fix driver on systems with non-4K pages
- fix locking with pageflipping in DC that could lead to a sleep while atomic
- fix VCN firmware version reporting for upcoming firmware
projects / mirror_ubuntu-kernels.git / log